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[Chemical Knowledge]：What are the upstream raw materials for ketene? What are the downstream products?

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Ketone plays an important role in the field of raw materials for chemical production, and its upstream and downstream related products are widely used. This article will detail the upstream and downstream related products of ketene, including upstream raw materials, downstream products, and by-products and wastes in the production process.

1. Upstream Raw Material

1. Acetic acid: The production of ketene mainly uses acetic acid as raw material and is produced by dehydrogenation reaction. Acetic acid is a common organic chemical raw material with abundant sources and relatively low price, which reduces the production cost of ketene.
2. Oxygen: During the dehydrogenation reaction, oxygen is introduced as an oxidant to promote the oxidative dehydrogenation of acetic acid to produce ketene.

2. Downstream Products

1. Vinyl acetate: vinyl acetate can be obtained by the reaction of vinyl acetate with acetic acid, which is an important organic chemical raw material, mainly used in the production of polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion.
2. ethyl acetoacetate: ethyl acetoacetate can be obtained by the reaction of ketene and ethanol, which is an important pharmaceutical intermediate for the production of anti-inflammatory, anti-epileptic drugs.
3. methyl methacrylate: ketene reacts with methanol to obtain methyl methacrylate, which is a monomer used in the production of organic glass, coatings, adhesives, etc.
4. Vinyl alcohol: Ketone reacts with water to obtain vinyl alcohol, which is a polymer compound used in the production of vinylon fiber, polyvinyl acetal, etc.

3. by-products and waste

1. Acetic anhydride: Acetic anhydride is produced as a by-product during the dehydrogenation reaction, which can be further recycled.
2. Wastewater: A certain amount of wastewater will be produced during the production process, mainly containing unreacted acetic acid, ketene, etc., which need to be treated to meet the discharge standards and discharged.
3. Waste gas: A certain amount of waste gas will be produced during the production process, mainly containing unreacted oxygen, acetic acid vapor, etc., which need to be treated by absorption and combustion.

In short, ketene has a wide range of upstream and downstream related products in the field of chemical production raw materials, involving a wide variety of raw materials and products. By optimizing and improving the production process of ethylene ketone, the utilization rate of raw materials and the yield of products can be improved, the production cost can be reduced, and the economic and social benefits of the enterprise can be improved. At the same time, strengthening the recycling and treatment of by-products and wastes can reduce environmental pollution and promote the development of green chemical industry.

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